10221 - Satellites

[898989]

Please can you give me some trick test cases

[serendipity]

can someone tell why am i getting WA?
I have checked all the test cases provided by the Electronic board. I cannot uderstand also wot wud b the calculation for a=180;


#include<stdio.h>
#include<math.h>
#include<string.h>

#define MAX 5
//#define pi 3.14159265358979323846
#define R 6440



int main(void)
{

double s,a ;
char str[MAX];

double rad, arc, cord, pi;
//freopen("10221.txt","r",stdin);
pi= acos(-1);
while((scanf("%lf%lf%s",&s,&a,str))==3)
{

if(a>180 && !( strcmp(str,"deg")) )
{
a=360-a;
}


if(!(strcmp(str,"deg")))
{
rad=(pi*a)/180;


}
else
{
a=a/60;
rad=(pi*a)/180;

}



/*if(a==180) ///is it ok?????????
{
arc=(R+s)*rad;
cord= 2.0*R+s;

}*/

if (a<=180)
{

arc = (R+s)*rad;
cord=( (R+s)*sin(a/(180/pi)) )/sin((0.5*(180-a))/(180/pi) );


}

printf("%.6lf %.6lf\n",arc, cord);
}


return 0;
}



thanx in advance!

[sakhassan]

well u had made an silly mistake
....
U should consider a = 180 & when a != 180..
By the way the formula for chord is
Chord_distance=2*radius*sin(angle/2)
for when a != 180
and Chord_distance=2*radius for when a = 180
am thinking r u calculation ur radius as
radius = R or radius = R+s -----> ur mistake

[newton]

All test case has passed but still WA!
where is the problem?

Code: Select all

#include <cstdio>
#include <cmath>
#include <cstring>
#include <algorithm>
#define R 6440
#define PI 2*acos(0.0)

using namespace std;

int main(){
   //freopen("in.txt","rt",stdin);
   int s,a;
   double arcDistance,cordDistance,sinA,sinB;
   char str[100];
   while(gets(str))
   {
      sscanf(str,"%d %d %s",&s,&a,str);
      if(strstr(str,"min"))
         a /= 60;            
      s = s + R;
      arcDistance = s * a * PI/180;
      sinA = sin(a*PI/180);
      sinB = sin((180 - a)*PI/360);
      if(a != 180)
         cordDistance = s * sinA / sinB;      
      else
         cordDistance = 2*s;
      printf("%.6lf %.6lf\n",fabs(arcDistance),fabs(cordDistance));
   }
   return 0;
}


[debugger]

Please say, what is my wrong? i am so suppressed.

Code: Select all

#include<stdio.h>
#include<math.h>

int main(){
    double s,a,pi,chord,rad,arc;
    char ch[6];
    pi=2*acos(0.0);
    while((scanf("%lf %lf %s",&s, &a, &ch))==3){
    if(ch[0]=='m')
    a=a/60;
    if(a>180)
    a=a-180;

    rad=pi*a/180;
    if(a==180){
        arc=pi*(s+6440);
        chord=2*(s+6440);
        }
        else{
            chord=2*(s+6440)*sin(rad/2);
            arc=rad*(s+6440);
            }
            printf("%.6lf %.6lf\n",arc,chord);
    }
    return 0;
    }


Quickly. please.

[calicratis19]

deleted after ac

[Obaida]

reduce calculation.....

Code: Select all

accepted

[calicratis19]

i got wa in this problem for a long time. it was nothing but precision err.i just decreased calculation in the code .i printed them directly nd then AC . meaning i did not use variable like arc , cord ,red etc.i did those operation in printf .... hope u understand. nd i didnt understand ur method .i used different method nd it takes less calculation then urs.

[asif_khan_ak_07]

why wrong answer

Code: Select all

#include<stdio.h>
#include<math.h>
#include<string.h>

#define pi 3.1415926535897932384626433832795

int main()
{

   //freopen("10221.txt","r",stdin);
   int s;
   char a[10];
   long double ans,temp,len,ac,deg;
   while((scanf("%d %Lf %s",&s,&deg,&a)==3)){
   
   if(!strcmp(a,"min"))
      ans=deg/60;
   else
      ans=deg;
   if(ans>180)
      ans-360-ans;
   ans=(pi*ans)/180;
   ac=6440+s;
   temp=(ac)*ans;
   len=2*ac*ac*cos(ans);
   len=(ac*ac)+(ac*ac)-len;
   len=sqrt(len);
   printf("%.6Lf %.6Lf\n",temp,len);

   }


return 0;
}

[Obaida]

@calicratis19 thank you very much. at last worked by reducing calculation.
More variable although with right calculation surly will get wrong answer.
@asif_khan_ak_07 try to reduce your variables. and don't forget to edit this part.

Code: Select all

ans-360-ans;

more info in my pm. keep solving

[fkrafi]

Why WA?????

Code: Select all

Solved


[plamplam]

Remember, if the angle is greater than 180.0(in degrees), then calculate with 360 - angle size . Just do the following thing to avoid complexity, take s and a as double and the angle unit as string(Remember to eliminate buffer). Then if str[0] == 'm', angle(a) = a / 60.0. I got AC without adding 1e-8 or stuff like that. Good luck

[sumit saha shawon]

I am getting run time error.But I think my code is ok.
My code:

#include<stdio.h>
#include<math.h>
#define pi 2*acos(0)
int main()
{
// double pi=;

double s,angel,rad,radius,ans1,ans2;
char array[5];
while(scanf("%lf%lf%S",&s,&angel,&array)==3)
{
if(angel>180)
angel=360-angel;
//printf("%d\n",angel);
if(array[0]=='m')
angel=angel/60;
rad=(pi/180)*angel;
//printf("%lf\n",rad);
radius=s+6440;
ans1=rad*radius;

ans2=2*radius*sin(rad/2.0);
printf("%0.6lf %0.6lf\n",ans1,ans2);
}
return 0;
}

[brianfry713]

Change line 10 to:
while(scanf("%lf%lf%s",&s,&angel,array)==3)

[sumit saha shawon]

thanks I have got Ac